Ice orb - A magical attack of Artemus' which is created by collecting certain matter from the air and removing energy from it, leaving a sphere of ice containing freezing liquids. The surface is solid water ice, insulating a liquid comprised of the air molecules and atoms with lower freezing points (usually nitrogen), which spreads over the target when the orb is broken, inflicting quick freeze burns.
Invisibility - Bending light around him fully, Artemus becomes effectively invisible to the naked eye. This technique can only be used with success while standing still.
"The Hitchhiker's Guide to the Galaxy. It's a sort of electronic book. It tells you everything you need to know about anything. That's its job."
Arthur turned it over nervously in his hands.
"I like the cover," he said. "'Don't Panic.' It's the first helpful or intelligible thing anybody's said to me all day."